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virsh: Implement sparse stream to vol-upload

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Similarly to previous commit, implement sparse streams feature
for vol-upload. This is, however, slightly different approach,
because we must implement a function that will tell us whether
we are in a data section or in a hole. But there's no magic
hidden in here.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Michal Privoznik
2017-05-18 07:42:13 +02:00
parent f03b44b2df
commit 7823e2561b
4 changed files with 98 additions and 14 deletions
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tools/virsh-util.c
+47
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@@ -153,6 +153,35 @@ virshStreamSink(virStreamPtr st ATTRIBUTE_UNUSED,
}
int
virshStreamSource(virStreamPtr st ATTRIBUTE_UNUSED,
char *bytes,
size_t nbytes,
void *opaque)
{
virshStreamCallbackDataPtr cbData = opaque;
int fd = cbData->fd;
return saferead(fd, bytes, nbytes);
}
int
virshStreamSourceSkip(virStreamPtr st ATTRIBUTE_UNUSED,
long long offset,
void *opaque)
{
virshStreamCallbackDataPtr cbData = opaque;
int fd = cbData->fd;
off_t cur;
if ((cur = lseek(fd, offset, SEEK_CUR)) == (off_t) -1)
return -1;
return 0;
}
int
virshStreamSkip(virStreamPtr st ATTRIBUTE_UNUSED,
long long offset,
@@ -171,6 +200,24 @@ virshStreamSkip(virStreamPtr st ATTRIBUTE_UNUSED,
}
int
virshStreamInData(virStreamPtr st ATTRIBUTE_UNUSED,
int *inData,
long long *offset,
void *opaque)
{
virshStreamCallbackDataPtr cbData = opaque;
vshControl *ctl = cbData->ctl;
int fd = cbData->fd;
int ret;
if ((ret = virFileInData(fd, inData, offset)) < 0)
vshError(ctl, "%s", _("Unable to get current position in stream"));
return ret;
}
void
virshDomainFree(virDomainPtr dom)
{